age = int(input("你多大了？"))

bus_fare = 4.25
fare_type = "标准"

# 小孩免费乘车
if age < 5:
    bus_fare = 0
    fare_type = "小孩"

# 老人优惠1元乘车
if age >= 60:
    bus_fare = bus_fare - 1
    fare_type = "老人"

print(fare_type + "的公交车票价是" + str(bus_fare) + "元。")